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Dauphin County, Pennsylvania
Dauphin County | |
|---|---|
 Dauphin County Courthouse in Harrisburg | |
 Flag  Seal | |
 Location within the U.S. state of Pennsylvania | |
 Pennsylvania's location within the U.S. | |
| Coordinates: 40°25′N 76°47′W / 40.41°N 76.79°W | |
| Country |  United States |
| State |  Pennsylvania |
| Founded | March 4, 1785 |
| Named for | Louis Joseph, Dauphin of France |
| Seat | Harrisburg |
| Largest township | Lower Paxton Township |
| Area | |
• Total | 558 sq mi (1,450 km2) |
| • Land | 525 sq mi (1,360 km2) |
| • Water | 33 sq mi (90 km2) 5.9% |
| Population | |
• Estimate (2023) | 289,234 |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 10th |
| Website | www |
| Designated | December 9, 1982[1] |
Dauphin County (/ˈdɔːfɪn/; Pennsylvania Dutch: Daffin Kaundi) is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 286,401.[2] The county seat is Harrisburg,[3] Pennsylvania's state capital and ninth-most populous city. The county was created on March 4, 1785, from part of Lancaster County and was named after Louis Joseph, Dauphin of France,[4] the first son of King Louis XVI. The county is part of the South Central Pennsylvania region of the state.[a]
Dauphin County is included in the Harrisburg–Carlisle Metropolitan Statistical Area.
Located within the county is Three Mile Island Nuclear Generating Station, site of the 1979 nuclear core meltdown. The nuclear power plant closed in 2019.
- ^ "PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original (Searchable database) on March 21, 2016. Retrieved January 25, 2014.
- ^ "2020 Census Demographic Data Map Viewer". The United States Census Bureau. Retrieved August 13, 2021.
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- ^ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. pp. 100.
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